Watercore in Japanese pear (Pyrus serotina Rehder var. ‘Culta’ Rehder). II. Chemical changes in watercored tissue
Watercore in Japanese pear (Pyrus serotina Rehder var. ‘Culta’ Rehder). II. Chemical changes in watercored tissue
复制标题
日本梨的水核（Pyrus serotina Rehder var. ‘Culta’ Rehder）。水核组织的化学变化。
DOI：
10.1016/0304-4238(76)90050-9
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发表时间：
1976
影响因子：
4.3
通讯作者：
K. Matsuda
中科院分区：
文献类型：
--
作者：
S. Yamaki;I. Kajiura;M. Omura;K. Matsuda
在日本梨的果实和叶子以及苹果的果实和叶子中检测到山梨醇。果实中可溶性糖主要由山梨醇、果糖、葡萄糖和蔗糖组成，其中果糖占优势。山梨醇是叶片中的主要成分，在水心形成初期，山梨醇、果糖和葡萄糖积累较多，但随着水心的发育，山梨醇和蔗糖主要积累在受害组织中。此外，呼吸活性和果胶含量，特别是原果胶的减少，已经观察到在受影响的组织中，即使在早期阶段。这种趋势也变得更加明显，随着水芯的增加。由此推测，糖代谢的改变和细胞组织的降解可能与日本梨水心的出现有关。
Sorbitol was detected in the fruit and leaf of Japanese pear, as well as in those of apple. Soluble sugars in the fruit were mainly composed of sorbitol, fructose, glucose and sucrose, and fructose was the dominant component among them. On the other hand, sorbitol was the main component in the leaf.At an early stage of watercore, sorbitol, fructose and glucose were accumulated, but as the watercore became severer, sorbitol and sucrose were accumulated mostly in the affected tissue. Moreover, the decrease in respiratory activity and pectin contents, especially protopectin, was already observed in the affected tissues even at an early stage. This tendency too became more conspicuous with severer watercore. From the above results it follows that the alteration of sugar metabolism and the degradation of cellular tissue may be connected with the appearance of watercore in Japanese pear.